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QC PLOTS |
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CURRENT |
HISTORY |
darkcurrent |
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QC1 database (advanced users):
browse
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plot
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Click on CURRENT to see the current trending (Health Check).
Click on HISTORY to see the historical evolution of the trending. |
The darkcurrent calibration is a technical calibration. It is not used to calibrate other calibrations or science data. The darkcurrent template acquires a sequence of dark frames with different DITs. The pipeline recipe fits the relation darkcurrent( DIT ). While the dark level retrieved from the dark recipe gives the dark counts in ADU for a master dark of a given DIT, the darkcurrent gives the current in ADU/sec in a more accurate manner.
QC1 parameters
parameter |
QC1 database: table, name |
procedure |
darkcurrent
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vircam_current, qc_darkcurrent |
- The QC.DARKCURRENT gives the dark current in ADU/sec. |
QC1 report (from 2009-10)
click in the image to see dark current fit of all detectors
Each detector has its own dark current. There following map shows the values in ADU/sec (June 2010):
chip13 |
chip 14 |
chip 15 |
chip 16 |
0.405 |
0.221 |
0.030 |
0.052 |
chip 9 |
chip 10 |
chip 11 |
chip 12 |
0.065 |
0.038 |
0.059 |
0.053 |
chip 5 |
chip 6 |
chip 7 |
chip 8 |
0.066 |
0.079 |
0.090 |
0.097 |
chip 1 |
chip 2 |
chip 3 |
chip 4 |
0.296 |
3.000 |
0.476 |
0.355 |
red labels mark detectors with relatively high dark current, green labels mark detectors with relatively low dark current.
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